Réponses

2013-04-26T11:53:25+02:00

A= 1/3+1/6-1/18 = 6/18+3/18-1/18 = 8/18=4/9

B=7/3+8x1/12 = 28/12+8/12=36/12=3

C=(2/7-3/7)x(3+5/3) =(-1/7)*(9/3+5/3)= (-1/7)*(14/3)=-2/3

  • Utilisateur Brainly
2013-04-26T11:55:58+02:00

A=1/3+1/6-1/18

  =6/18+3/18-1/18

  =8/18

  =4/9

 

B=7/3+8x1/12

  =7/3+8/12

  =7/3+2/3

  =9/3

  =3

 

C=(2/7-3/7)x(3+5/3)

   =(-1/7)*(9/3+5/3)

   =(-1/7)*(14/3)

   =-14/21

   =-2/3